FLEX-HONE GBD41232 Cylinder Hone, 4-1/2 Inch Bore, 320 Grit, Silicon Carbide

FLEX-HONE GBD41232 Cylinder Hone, 4-1/2 Inch Bore, 320 Grit, Silicon Carbide

• The Brush Research GBD41232 Flex-Hone is a heavy-duty cylinder honing tool engineered for 4-1/2" bore diameter applications. Featuring 320 grit silicon carbide abrasive and a 6" honing section, it delivers a plateau-style cross-hatch finish ideal for improving lubrication retention, reducing leakage, and refining sealing surfaces in engine blocks, hydraulic cylinders, and industrial bores.
• Features:
  • Bead-style, flexible filament design with self-centering and self-aligning action
  • 320 grit silicon carbide abrasive balances peak removal with preservation of oil valleys
  • Non-directional plateau cross-hatch pattern enhances seal integrity and fluid retention
  • Heavy-duty construction optimized for large-diameter bores in block and industrial applications
• Specifications:
  • Bore Diameter: 4-1/2"
  • Abrasive Material: Silicon Carbide
  • Grit: 320 (Extra-Fine)
  • Abrasive Length: 6"
  • Overall Length: 13-1/2"
  • Recommended Speed: up to 600 RPM
  • Typical Surface Finish: 18–30 µin Ra
  • Applications: Engine block cylinders, hydraulic bores, industrial piping
• The FLEX-HONE GBD41232 can also be referred to as 4-1/2" bore hone, GBD41232 flex hone, silicon carbide cylinder hone, plateau finishing brush, and heavy-duty bore tool.

Brush Research Manufacturing’s GBD-Series Flex-Hones are trusted across automotive, hydraulic, and industrial sectors for delivering consistent plateau-style finishes in large-bore applications.

Q: What bore diameter is this hone designed for?
A: The GBD41232 is engineered specifically for 4-1/2" bore diameter cylinders.

Q: What finish quality does the 320 grit provide?
A: It creates a fine plateau finish in the range of 18–30 µin Ra, ideal for refined sealing surfaces and oil retention.

Q: Can this hone be used with a handheld drill?
A: Yes—when used with a drill press or handheld drill, maintain speeds up to 600 RPM and use honing oil for lubrication.

Q: What materials is this hone suitable for?
A: Effective on mild steel, stainless steel, cast iron, and other ferrous materials in industrial and hydraulic cylinders.

Q: What lubricant should be used?
A: Use oil-based honing lubricants to protect the abrasive bond and achieve optimal surface finish.